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NET INCOME (LOSS) PER SHARE - Additional Information (Details) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 25, 2015	Apr. 26, 2014
Earnings Per Share [Abstract]
Number of common stock classes	2vlgea_NumberofClassesofCommonStock
Common stock cash dividends, percent Class A is entitled greater than Class B	54.00%
Conversion of stock, conversion ratio	1vlgea_ConversionofStockConversionRatio
Common Class A [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Class A shares excluded from computation of earnings per share	233	443
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Class A shares excluded from computation of earnings per share	271	288

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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